Arthur histon



A2 Sheets-Sheet l. A. HISTON. GAS ENGINE.

(No Model.)

Patented Apr. 2, 18,894.

N. PETERS. PhnlLithogrnpher, Washington. D,C.

Patented Apr. 2f 1889.

n, Para; Pmmumugnpher. wamsngum n c.-

NITED *STATES lWENT FFICE.

ARTHUR I-IIsToN, or YoNKERs, AssIGNoR oF ONE-HALF To oTIs BRoTHERsa Y, COMPANY, on NEW YORK, N. Y. f

lGAS-ENGINE SPECIFICATION formingpart of Letters Patent No. 400,458, dated April 2, 1889. Application filed April 20, 1888. Serial No. 271,283. (No model.) Patented in England October 15, 1887, No. 13,991.

To all whoml it may concern:

land, dated October l5, 1887, No. l3,991,) of

which the following is a full, clear, and exact specification. f

My invention relates to that class of gas-f engines in which a reciprocating 'piston is propelled in one direction in a cylinder by the explosion of a gaseous mixture within the cylinder; and my inventionl consists of cer'- tain means, fully set forth hereinafter, of controlling the inlet and discharge of the gases.

In the drawings, Figure I is a sectional elevation of a gas-engine embodying my improvement. Fig 2 is a part sectional plan. Fig. 3 is a section on the line 3 3, Fig. 2, looking in the direction of the arrow. Fig. 4 is a section on the line 4 4, Fig.- 3, the pistonbeing omitted. Y

The bed A of the engine supports a horizontal cylinder, B, surrounded` by the usual 'Water-jacket, open at the forward end, and containing a pump-piston, O,- to which is jointed a rod, D, connecting the piston with the crank of a `crank-shaft, E, supported in pillow-boxes on the bed and carrying a iiywheel, F. The cylinder-Bis enlarged beyond thevpoint reached by the piston on its rear motion to forman explosion-chamber, at, with which communicates a port, 2, for the admission of air, which port is closed by a checkvalve, 3, opening upwardly, so that the air will be drawn into the cylinder on the forward motion of the piston, the valve 3 closing as the piston moves back. With the combustion-chamber 0c at one side and above the port 2 communicates a port, 4, leading to avalvecasing, 5, with which communicates a gaspipe, 7, and a valve, '6, closing the passage through the 'valve-casing 5, is secured to a stem, 8, provided with a head, 9, between which and the casing intervenes a coiled spring, 10, that tends to maintain the valve 6 upon its seat. In bearings upon the cylinder, in line with the valve-stem 8, is supported a sliding rod, l2, to which is jointed a connecting-rod, 13, extending to the strap 14 of an eccentric, l5, upon the crank-shaft E, whereby the rod l2 is reciprocated and carried to and from the stem 8 to lift the valve 6 and permit it to close under the action oi the spring, thereby regulating the flow of gas to the cylinder. nicates with the cylinder Bin position to be uucovered by the piston after the latter passes forward beyond the middle of its stroke, and the said port 'y communicates with a casing, 1G, and with the exhaust-pipe 17, through a passage controlled by a valve, 18, the stem 19 of which isconnected with the lever 20, jointed at its opposite ends t0 a connection upon the rod 13, and' pivoted between its vends to a bracket supported by the cylinder, so that as the rod 13 is moved backward it will open the exhaust-valve as the piston uncovers the .port g, and will then open the gas-inlet valve to admit a new charge. A spring, 2l, bear= ing upon the head of the exhaust-valve spindle, tends to maintain the exhaust-valve in its seat, and the parts are preferably so arranged that the gas-valve may be opened slightly The exhaust-port y commuahead of the opening of the exhaust-valve,

which latter will be opened just prior to the time when the piston on itsv forward movement passes the exhaust-port y.

In connection with a suitable ignitor, the operations of the above-described parts will be as follows: When the piston C begins its forward stroke, the valve 3 is lifted and the air passes freely into the'cylinder behind the piston, and a portion of gas is also admitted through the. gas-port, and the mixture is compressed upon the backward movement of the pist-on, and is exploded just as the piston reaches the limit of its backward movement.

vUpon the next forward movement of the pisreturn-stroke, the exhaust-valveand gas-valve e cont are closed and the air-valve 3 takes its seat automatically, and the gaseous mixture is compressed within the explosion-chamber and there explodes as the piston reaches the limit of its rear movement, the operations be ing then repeated and maintaining a continuous rotation of the shaft and ily-Wheel.

It Will be' seen that by the arrangement of parts described I operate both the gas-valve and the exhaust-valve from n single eccentric, and, that by a slight adjustment of the position of the contacting parts I can vary the time of the opening of the valves as may be desired.

Vithout limiting myself to the precise construction and arrangement of parts described, I claim-e 1. A cylinder provided at the rear end with separate ports communicating one with the external nir and the other with a gas-supply pipe, an exhaust-port arranged to be uncovered on the forward movement of the piston, valves controlling the gas-passage, the airport, and the exhaust-passage, and connections between -the ges end exhaust valves, and an eccentric-rod operated by an eccentric upon the crank-shaft of the engine, substani tially as set forth.

2. The combination, in a gas-engine, of a cylinder and reciprocating piston, an air-inlet in the cylinder provided with a valve, a separate gas-inlet in the cylinder, also provided.

with a valve, sin exhaust provided With a valve, and a reciprocating rodsupported in bearings outside of the cylinder, and separate' connections between the said rod and both the gas and exhaust Valves, substantially as set ARTHUR HISTON.

Titnessesz J. A. HovEY, J i J. KENNEDY, 

